212101222112121 has 32 divisors (see below), whose sum is σ = 289591897154560. Its totient is φ = 138010569681600.

The previous prime is 212101222112119. The next prime is 212101222112231. The reversal of 212101222112121 is 121211222101212.

It is not a de Polignac number, because 212101222112121 - 2¹ = 212101222112119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212101222112821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 992927595 + ... + 993141183.

It is an arithmetic number, because the mean of its divisors is an integer number (9049746786080).

Almost surely, 2^{212101222112121} is an apocalyptic number.

It is an amenable number.

212101222112121 is a deficient number, since it is larger than the sum of its proper divisors (77490675042439).

212101222112121 is a wasteful number, since it uses less digits than its factorization.

212101222112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219277.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212101222112121 its reverse (121211222101212), we get a palindrome (333312444213333).

The spelling of 212101222112121 in words is "two hundred twelve trillion, one hundred one billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".